ACCOUNT OF GENUS SEDUM AS FOUND IN CULTIVATION. 133 



5. ehracteaiuni, it varies as regards hairiness and colour of stem and 

 shape of leaf sufficiently to include 5. rubricaule. 

 The name refers to the red colour of the stems. 



48. Sedum chapalense S. Watson. 



S. chapalense S. Watson, Proc. Amer. Acad., 22, 411, 1887. 



Synonym. — Sedastrum chapalense Rose in " N. Amer. Flora," 22, 59, 1905. 



Distinguished from the other Sedastrums in cultivation by its 

 small size (about 4 inches high), glabrous stems (though the leaves are 

 slightly pubescent), and thin stem-leaves. Plants sent from Washing- 

 ton by Dr. Rose unfortunately died before flowering, so I have not had 

 an opportunity of stud)dng the plant. 



Description. — Stems stout, about 4 inches high, much branched above, 

 glabrous, yellowish- green. Leaves slightly pubescent, those of the barren shoots 

 rosulate, obovate, or ovate, rather acute, | inch long, stem-leaves rather thin. 

 Flowers sessile, arranged along one side of the branches, 5-parted. Calyx slightly 

 pubescent, lobes unequal, oblong-ovate, rather acute. Petals oblong-ovate, 

 acute, } inch long, white. Stamens 10. Scales small. Carpels equalling the petals. 



Habitat. — Mexico. Not hardy. 



The above description is taken from those of S. Watson and Rose 

 {loc. cit.). 



Named after the type locality, Chapala. 



Series II. Alamosana. 



Small (3-6 inches high). Leaf-rosettes absent, or small and lax. 

 Stems annual or lasting up to eighteen months. Carpels not hollowed 

 behind the scales. 



alamosanum S. Watson. lenophylloides Rose. 



mellitulum Rose. helium Rose. 



Cockerellii Britton. versadense Thompson. 



Wrightii A. Gray. diversifoUum Rose. 

 potosinum Rose. 



49. Sedum alamosanum S. Watson (fig. 69). 



S. alamosanum S. Watson in Proc. Amer. Acad., 25, 148, 1890. 

 " N. Amer. Flora," 22, 62, 1905. 



A handsome little Mexican species, near to S. mellitulum, with 

 which it has been confounded. The very dense-leaved glaucous 

 young shoots, few-flowered inflorescence, bright-red buds, reddish-white 

 flowers, and early vernal blooming, sufficiently distinguish it from S. 

 mellitulum, which is laxer and greener in growth, with longer leaves, 

 a compact, fiattish inflorescence, greenish- white buds, and quite white 

 flowers which open in autumn. 



Description. — A small glaucous perennial. Stems tufted, erect, afterwards 

 diffuse, often slightly branched, 3-5 inches long. Leaves crowded, j inch long, 

 linear-oblong, blunt, ascending, very glaucous, ultimately reddish, covered, save 



